Induced magnetization and inhomogeneous superconductivity in presence of external magnetic field

Thermodynamic characteristics of the one-dimensional attractive Hubbard model are calculated by means of the generalized self-consistent field (GSCF) approach for a wide range of interaction strength U⩽0, in the presence of external magnetic field h⩾0, temperature T⩾0 and electron concentration 0⩽ n...

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Bibliographic Details
Published inPhysica. C, Superconductivity Vol. 364; pp. 155 - 157
Main Authors Yang, C., Kocharian, A.N., Chiang, Y.L.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.11.2001
Subjects
Hubbard model
Inhomogeneous superconductivity
Phase diagram
74.10.Fd
Inhomogeneous superconductivity
74.25.Dw
74.20.−z
Hubbard model
Phase diagram
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Summary:Thermodynamic characteristics of the one-dimensional attractive Hubbard model are calculated by means of the generalized self-consistent field (GSCF) approach for a wide range of interaction strength U⩽0, in the presence of external magnetic field h⩾0, temperature T⩾0 and electron concentration 0⩽ n⩽1. The GSCF theory shows a sharp transition driven by h>0 and T from the uniform superconducting state into a spatially inhomogeneous state in which the order parameter Δ q (−) has wave vector ( 0<| q |⩽π ). The concentration of double occupied sites and the bound electron pairs with opposite spins n pair are calculated and we found a simple relationship between the order parameters Δ (−) q and average spin s, valid for the arbitrary U, all n and h.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0921-4534
1873-2143
DOI:10.1016/S0921-4534(01)00742-0